电动膨胀循环变推力液体火箭发动机推力控制方案  

Thrust control scheme for electric expander cycle of variable thrust liquid rocket engine

作　　者：梁涛 胡润生 李清廉[1] 崔朋 宋杰 陈兰伟 LIANG Tao;HU Runsheng;LI Qinglian;CUI Peng;SONG Jie;CHEN Lanwei(Science and Technology on Scramjet Laboratory,College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China;Beijing Institute of Tracking and Telecommunications Technology,Beijing 100094,China)

机构地区：[1]国防科技大学空天科学学院,高超声速冲压发动机技术重点实验室,长沙410073 [2]北京跟踪与通信技术研究所,北京100094

出　　处：《航空动力学报》2023年第12期2957-2972,共16页Journal of Aerospace Power

基　　金：科技大学自主科研项目。

摘　　要：以电动膨胀循环变推力液体火箭发动机为研究对象,设计了一种适用于电动膨胀循环发动机的推力闭环控制方案,其次基于AMESim平台建立了控制系统仿真模型,验证了重要部组件模型的准确性,并基于电动机泵和涡轮泵动力学模型对PID控制器进行了参数整定,最后着重针对推力调节的阶跃信号和斜坡信号开展了控制仿真。结果表明:在推力变比5∶1全工况范围内,双PI控制器适用于电动膨胀循环发动机推力调节控制,系统不存在稳态误差,但是调节过程存在波动;针对调节过程而言,双PI控制器控制信号的比例输出振荡是控制目标波动的主因,而积分输出造成了控制目标的稳态误差;相比阶跃信号调节,双PI控制器跟踪斜坡信号的效果更好,因此实际使用中,应尽量考虑斜坡信号进行推力调节。A thrust closed-loop control scheme for electric expander cycle of variable thrust liquid rocket engine was designed,and the control system simulation model was established based on AMESim platform.Besides,the simulation model of some important components was verified.Secondly,the PID(proportional-integral-derivative)controller parameters were selected based on the dynamic models of motor pump and turbopump.Finally,control simulation was carried out for the step signal and slope signal of thrust regulation.The results showed that the double PI controller was suitable for the thrust regulation control of electric expansion cycle engine within the range of thrust ratio 5∶1,and there was no steadystate error in the system,though the oscillation of thrust existed during the throttling process;secondly,for the throttling process,the proportional output oscillation of the control signal of the dual PI controller contributed much to the fluctuation of the control target,and it cannot restrain the fluctuation effectively;compared with step signal,the effect of dual PI controller tracking slope signal was better,so in practice,the slope signal should be considered for thrust throttle.

关 键 词：电动膨胀循环 液体火箭发动机 推力调节 PID控制 动态特性 

分 类 号：V433[航空宇航科学与技术—航空宇航推进理论与工程] V434